ABAP Select data from SAP table EWA_EHSWAV_100 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP EWA_EHSWAV_100 table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to EWA_EHSWAV_100. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the EWA_EHSWAV_100 table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_EWA_EHSWAV_100 TYPE STANDARD TABLE OF EWA_EHSWAV_100,
      WA_EWA_EHSWAV_100 TYPE EWA_EHSWAV_100,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <EWA_EHSWAV_100> TYPE EWA_EHSWAV_100.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_EWA_EHSWAV_100.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM EWA_EHSWAV_100
  INTO TABLE IT_EWA_EHSWAV_100.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EWA_EHSWAV_100
*  INTO TABLE @DATA(IT_EWA_EHSWAV_1002).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_EWA_EHSWAV_100 INDEX 1 INTO DATA(WA_EWA_EHSWAV_1002).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_EWA_EHSWAV_100 ASSIGNING <EWA_EHSWAV_100>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EWA_EHSWAV_100>-MANDT = 1.
<EWA_EHSWAV_100>-RECN = 1.
<EWA_EHSWAV_100>-ACTN = 1.
<EWA_EHSWAV_100>-VALFR = 1.
<EWA_EHSWAV_100>-VALTO = 1.

ENDLOOP.

LOOP AT IT_EWA_EHSWAV_100 INTO WA_EWA_EHSWAV_100.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EWA_EHSWAV_100-AENNR, sy-vline,
  WA_EWA_EHSWAV_100-DELFLG, sy-vline,
  WA_EWA_EHSWAV_100-PARKFLG, sy-vline,
  WA_EWA_EHSWAV_100-CRDAT, sy-vline,
  WA_EWA_EHSWAV_100-CRNAM, sy-vline,
  WA_EWA_EHSWAV_100-UPDDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EWA_EHSWAV_100 you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_EWA_EHSWAV_100 TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_EWA_EHSWAV_100 INTO WA_EWA_EHSWAV_100.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWA_EHSWAV_100-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWA_EHSWAV_100-AENNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OWNID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWA_EHSWAV_100-OWNID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWA_EHSWAV_100-OWNID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWA_EHSWAV_100-PARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWA_EHSWAV_100-PARTNER.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_EWA_EHSWAV_100_STR, 
MANDT TYPE STRING,
RECN TYPE STRING,
ACTN TYPE STRING,
VALFR TYPE STRING,
VALTO TYPE STRING,
AENNR TYPE STRING,
DELFLG TYPE STRING,
PARKFLG TYPE STRING,
CRDAT TYPE STRING,
CRNAM TYPE STRING,
UPDDAT TYPE STRING,
UPDNAM TYPE STRING,
SRSID TYPE STRING,
OWNID TYPE STRING,
RECNROOT TYPE STRING,
RLTYP TYPE STRING,
DFVAL TYPE STRING,
PARTNER TYPE STRING,
WAE_PRE TYPE STRING,
WAE_SUCC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EWA_EHSWAV_100_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_EWA_EHSWAV_100_STR-MANDT sy-vline 
WA_EWA_EHSWAV_100_STR-RECN sy-vline 
WA_EWA_EHSWAV_100_STR-ACTN sy-vline 
WA_EWA_EHSWAV_100_STR-VALFR sy-vline 
WA_EWA_EHSWAV_100_STR-VALTO sy-vline 
WA_EWA_EHSWAV_100_STR-AENNR sy-vline 
WA_EWA_EHSWAV_100_STR-DELFLG sy-vline 
WA_EWA_EHSWAV_100_STR-PARKFLG sy-vline 
WA_EWA_EHSWAV_100_STR-CRDAT sy-vline 
WA_EWA_EHSWAV_100_STR-CRNAM sy-vline 
WA_EWA_EHSWAV_100_STR-UPDDAT sy-vline 
WA_EWA_EHSWAV_100_STR-UPDNAM sy-vline 
WA_EWA_EHSWAV_100_STR-SRSID sy-vline 
WA_EWA_EHSWAV_100_STR-OWNID sy-vline 
WA_EWA_EHSWAV_100_STR-RECNROOT sy-vline 
WA_EWA_EHSWAV_100_STR-RLTYP sy-vline 
WA_EWA_EHSWAV_100_STR-DFVAL sy-vline 
WA_EWA_EHSWAV_100_STR-PARTNER sy-vline 
WA_EWA_EHSWAV_100_STR-WAE_PRE sy-vline 
WA_EWA_EHSWAV_100_STR-WAE_SUCC sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.